Add script to check network configuration consistency.

windows/scripts/check_network.sh

+#! /bin/bash
+#
+# It used to check the following network setting
+#
+#    1. Support IPv6 or not.
+#
+#    2. Is there network connection re6stnet-lo or not.
+#
+#    3. Make sure only one MSLOOP network adapter.
+#
+#    4. interface_name in the Node configure file is re6stnet-lo
+#
+
+function usage()
+{
+    echo Check network setting, usage:
+    echo
+    echo   check_network.sh [node_config_file]
+    echo
+    echo   The default node config file is /etc/opt/slapos/slapos.cfg
+    echo
+}
+
+# Get connection name by GUID name, for example
+#
+#     $ guid2name {C8D7F065-AD35-4777-A768-122451282533}
+#
+function guid2name()
+{
+    if [[ "$1" == "" ]] ; then
+        echo
+    else
+        netsh interface ipv6 show interface level=verbose | \
+        grep -B 1 "$1" | \
+        grep "^Connection" | \
+        sed -e "s/^Connection Name\\s*:\\s*//g"
+    fi
+}
+
+# Default node configure filename
+node_config_file=${1-/etc/opt/slapos/slapos.cfg}
+
+echo
+echo "Checking IPv6 stack ..."
+netsh interface ipv6 show interface > /dev/null
+if (( $? )) ; then
+    echo "Warning: No IPv6 installed."
+    echo "Check IPv6 stack failed."
+else
+    echo "Check IPv6 stack OK."
+fi
+echo
+
+echo
+echo "Checking $node_config_file ..."
+if [[ -f $node_config_file ]] ; then
+    echo "Check node configure file OK."
+    
+    echo
+    echo "Checking interface_name ..."
+    interface=$(grep "^interface_name\\s*=" $node_config_file | \
+                sed -e "s/^interface_name\\s*=\\s*//g")
+
+    if (( $? == 0 )) ; then
+        ifname=$(guid2name $interface)
+        if [[ "$ifname" == "" ]]; then
+            echo "Warning: no interface $interface found in your computer."
+            echo "Check interface name failed."
+        elif [[ "$ifname" == "re6stnet-lo" ]]; then
+            echo "Check interface name OK."
+        else
+            echo "Warning: connection name of $interface is $ifname, " \
+                  "expect it is re6stnet-lo."
+            echo "Check interface name failed."
+        fi
+    else
+        echo "Warning: no interface_name found in the $node_config_file"
+        echo "Check interface name failed."
+    fi
+    echo
+
+else
+    echo "Warning: $node_config_file doesn't exists."
+    echo "Check node configure file failed."
+fi
+echo
+
+echo
+echo "Checking duplicate MSLOOP network adapter ..."
+local -i n=$(getmac /V /FO LIST | grep "Network Adapter:  Microsoft Loopback Adapter" | wc -l)
+(( n > 1 )) && echo "More than one MSLOOP network adapter found. Be ware all of them share one same MAC Address, thus same IPv6 link address!"
+echo